Gas producer



April 13, 1 937. I H. HILLEBRAND 2, 6,

GAS PRODUCER Filed Aug 24, 1952 In venzon:

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UNITED STATES GAS PRODUCER Hermann Hillebrand, Berlin-Friedrichshagen, Germany, assignor to N. V. Machinerieen-en Apparaten Fabrieken Meaf, Utrecht, Netherlands Application August 24,

1932, Serial No. 630,276

In Germany August 25, 1931 6 Claims.

This invention relates to a special form of gase producer and more especially has the object of obviating the disadvantage of the revolving grates which have been used upto now. Such revolving grates are used to increase the capacity of gasproducers and to avoid the formation of coke .and slag. Nevertheless, it is observed that in the middle of the chamber in such devices a nucleus remains which can not be removed by eccentrically revolving grates. Therefore, it has been proposed to replace this nucleus by a wall of firebricks positioned on the grate in order to remove the dead nucleus of coal and to obtain a more uniform passing of the coal in the chamber.

The invention dispenses with the revolving grate and shows a way of handling the problem contrary to that outlined above. The coal is introduced into the chamber in a special way which results in a uniform sliding thereof so as to avoid the formation of a dead nucleus in the producer.

More specifically this is obtained by positioning the feeding-chute directly over an inclined plane,

the projection of the inclined plane in ahorizontal plane being greater than the cross sectional area of the feeding chute.

The invention may also be applied advantageously to gas-producers having a plurality of chambers and not only to producers having but two chambers.

In the drawing:

Fig. 1 is an elevational cross sectional diagrammatic View showing a prior art producer which may be converted by the present invention.

Fig. 2 shows diagrammatically an elevational cross section of a gas producer constructed according to the present invention.

Fig. 3 is a cross section on the line 3-3 of Fig. 2.

Fig. 4 is a similar view of a producer having a double casing, and

Fig. 5 is a cross section on the line 5-5 of Fig. 4, and

Fig. 6 is a similar view of an annular shaped gas producer embodying the principle of the invention.

Fig. 7 is a cross section on the line 'l'! of Fig. 6. In Fig. 1 a gasifying chamber l is placed below a chamber for extracting gas. 2 is a cone valve to control the re-filling. This valve may be built 5 in the well known manner so as to have a double action for avoiding the escape of gases. Moreover an additional gas-tight closure may be used. 2| is a gas outlet. The dotted lines 3 within the gas extracting chamber shown in Fig. 1 indicate temporary positions assumed by coal-particles as they slide through the chamber. These dotted lines have been determined by experiments.

From these lines it is evident that the coal in the middle of the chamber slides considerably more quickly than at the sides. It happens that the coal is stopped at the sides and that only through a very small and thin zone in the middle of the producer can the coal pass. The dotted line 4 indicates the position at the sides where the coal does not move at all. If gasifying is carried out with such a producer the portion of coal in the middle would fall into the ash-tray without being gasified hardly at all whilst the slowly sliding nucleus would be gasified near the top so as to allow the air introduced at the bottom to pass through without any considerable resistance. Thereby, the small chance that the coal sliding down in the middle would be gasified is still further reduced. As in the case of the production of water-gas, by intermittently introducing air and steam, for example, it does not come into contact with the air at all. The same applies to watergas producers which are operated by a heated gas-stream, this gas-stream of 900-l200 C. being gas would rise. at the sides without coming into contact with the new charges of coal sliding down in the middle in such a way that a water-gasreaction could not take place.

In Figs. 2 and 3 a producer 3 which avoids these drawbacks is shown. The feeding-chute 5 is placed above an inclined plane 6 in such a way that the inclined plane 6 is situated beneath the feeding-chute 5 so as to extend over the whole cross-sectional area of the feeding-chute. The coal at the end of the feeding-chute 5 forms an angle on the left side as shown in this figure. The sliding-conditions of the coal are indicated by dotted lines. In this case it may also be seen that the coal on the sides will slide more slowly but no nucleus exists in the middle which would result in a quicker sliding of the coal to the ashtray. In this case the proper positioning of the dotted lines were also determined by experiments. The producer has a gas inlet 22 and a gas outlet 23. 7

Figs. 4 and 5-show a further embodiment of the invention. This form is especially suitable for rebuilding the known producers according to the present invention. In the producer shown a separating wall 3 is inserted. The original fillingchamber 9 is converted into a gas-flue and plates Ill are provided in such a way as to form a new feeding-chute II, the size of which depends onthe projection of the inclined plane l2. It is advisable in this ring-shaped feeding chute to build one or more fuel-charging devices. Apart from this the operation and the sliding-conditions are the same as those in the arrangement shown in Fig. 2. The producer has a gas inlet 24 and a gas outlet 25.

Figs. 6 and 7 show a perfectly proportioned ring-shaped producer, the feeding-chute of which is situated on the outer edge. The reference numeral l3 represents the fuel charging devices which are provided advantageously around the 5 whole ring-shaped feeding-chute at certain intervals. The coal slides over the inclined plane I4 into the chamber I5. In the middle a cylindrical nucleus I6 is provided in such a way that a ring-shaped chamber I5 is also formed. At l!- 10 an ordinary device for carrying out the cokev and.

the slag is provided. The producer has a gas inlet 26 and a gas outlet 21.

I claim:

1. In a gas producer, a vertical fuel supply shaft, a gasifying chamber disposed below and to one side of said fuel supply shaft, said chamber having a lower vertical side wall and a highervertical side wall forming-together a vertical gasifying shaft, a downwardly inclined-wall connecting 0 one lower-edge of said supply shaft to the upper edge of the lower vertical wall of said gasifying chamber, the higher side wall extending above and below the lower edge of said inclined wall, said inclined wall having a surface area at least as great as the cross sectional area of said shaft, andv a substantially horizontal wall connecting theopposite lower edge of said shaft to theupper edge of the higher wall of said chamber, and means to introduce gas at the bottom of said vertical gasifying shaft.

2. A gas producer comprising a funnel-shaped chamber, a plurality of cylindrical fuel supply shafts disposed in annular formation above the upper edge of the inclined wall of said funnelshaped chamber, the said inclined wall of said chamber extending inwardly a greater distance than the diameter of said supply shafts, a vertical wall extending downwardly from the lower edge of said inclined wall, and a vertical cylindrical shaft of substantially less diameter than the diameter of any portion of said chamber and forming with said first vertical wall a vertical gasifying chamber, said cylindrical shaft centrally disposed within said chamber and extending above and below the lower edge of said inclined wall, and means to introduce gas at the bottom of said vertical gasifying shaft. a

3. In a gas producer, a chamber funnel-shaped in elevational cross section, said chamber having a vertical wall extending upwardly from the upper edge of the inclined wall ofsaid chamber, a centrally disposed vertical wall dividing said chamber and extending above and below the'lower edge of said inclined wall, a gas collecting chamber centrally disposed in the top of said first cham-- ber, the outer diameter of said collecting chamber being less than the diameter of the upper edge of saidfirst chamber, the inclined walls of said funnel-shaped chamber extending inwardly to points inward of the outer vertical edges of said collecting chamber, and a vertical wall extending downwardlyfrom the lower edge of said inclined wall and forming with the opposite portion of the centrally disposed vertical wall a vertical gasifying shaft, and means to introduce gas at the-bottom of said vertical gasifying shaft.

4. In a gas producer, a vertical fuel supply shaft, a gasifying chamber disposed below said shaft, one wall of said chamber being inclined and 7'0 running from the outer lower edge of said shaft downwardly and laterally inward across the vertical projection of said shaft, the projection of said wall in a horizontal plane being greater than the cross sectional area of said shaft whereby said wall extends inwardly beyond the vertical projection of the inner lower edge of the shaft, said gasifying chamber having a vertical wall spaced from the lower. end of said inclined wall and extending, from a point below the lower end of said inclined wall substantially up to the level of the inner lower edge of said fuel supply shaft, a vertical wall extending downwardly from the lower edge of said inclined wall and forming with the opposite portion of said first vertical wall a vertical gasifying shaft, and a top wall extending over at least a portion of said gasifying cham ber at a point at least as high as the lower edges of said fuel supply shaft, said top wall overlying a portion of said inclined wall, and means to introduce gas at the bottom of said vertical gasifying shaft.

5. In agas producer, a vertical fuel supply shaft, a gasifying chamber disposed below said shaft, one wall of said chamber being inclined and running from theouter lower edge of said shaft downwardly and laterally inward across the vertical projection of said shaft, the projection of said inclined wall in a horizontal plane being greater than the cross sectional area of said shaft whereby said wall extends inwardly beyond the vertical projection of the opposite lower edge of the shaft, said gasifying chamber having a vertical wall spaced from the lower end of said inclined wall and extending from apoint below the lower end of said inclined wall substantially up to the level of the inner lower edge of said fuel supply shaft, a Vertical wall extending downwardly from the lower edge of said inclined wall and forming with the opposite portionof said first vertical wall a vertical gasifying shaft, the portion of said gasifying chamber opposite said inclined wall being widerthan the portion between said vertical walls, and means to introduce gas at the bottom of said vertical gasifying shaft.

6. In a gas producer, a vertical fuel supply shaft, a gasifying chamber disposed below said shaft, one wall of said chamber being inclined and running from the outer lower edge of said shaft downwardly and laterally inward across the a vertical projection of said shaft, the projection of said wall in a'horizontal plane being greater than the cross sectional area of said shaft whereby said wall extends inwardly beyond the vertical projection of the opposite lower edge of the shaft, said gasifying chamber having a vertical wall spaced from the lower end of said inclined wall and extending from a point below the lower end of said inclined wall substantially up to the level of the inner lower edge of said fuel supply shaft, a vertical wall extending downwardly from the lower edge of said inclined wall and forming with the opposite portion of said first vertical wall a vertical gasifying shaft, the total width of the gasifying chamber at the plane of the inner lower edge of the fuel supply shaft being" equal to the sum of the area of the space between the inclined wallsand the area of the projection of the inclined wall on a horizontal plane.

HERMANN HILLEBRAND. 

